# from django.shortcuts import render, HttpResponse
from django.http import HttpResponse
from django.http import HttpResponseRedirect
# from django.http import Http404
from django.shortcuts import get_object_or_404
# from django.template import loader
from django.shortcuts import render
from django.urls import reverse
from django.views import generic

from polls.models import Question
from polls.models import Choice

# Create your views here.

class IndexView(generic.ListView):
    template_name = 'polls/index.html'
    context_object_name = 'latest_question_list'

    def get_queryset(self):
        """Return the last five published questions."""
        return Question.objects.order_by('-pub_date')[:5]

# def index(request):
#     latest_question_list = Question.objects.order_by('-pub_date')[:5]
#     context = {'latest_question_list': latest_question_list};
#     return render(request, 'polls/index.html', context)
#    template = loader.get_template('polls/index.html')
#    context = {
#        'latest_question_list': latest_question_list
#    }
#    return HttpResponse(template.render(context, request))
#    output = ', '.join([q.question_text for q in latest_question_list])
#    return HttpResponse(output)

class DetailView(generic.DetailView):
    model = Question
    template_name = 'polls/detail.html'

# def detail(request, question_id):
#    question = get_object_or_404(Question, pk=question_id)
#    return render(request, 'polls/detail.html', {'question': question})
#    try:
#        question = Question.objects.get(pk=question_id)
#    except Question.DoesNotExist:
#        raise Http404("Question dose not exist")
#    return render(request, 'polls/detail.html', {'question': question})
#    return HttpResponse("You're looking at question %s" % question_id)

class ResultsView(generic.DetailView):
    model = Question
    template_name = 'polls/results.html'

# def results(request, question_id):
#     question = get_object_or_404(Question, pk=question_id)
#    print(question.choice_set.all())
#    return render(request, 'polls/results.html', {'question': question, 'choice_set': question.choice_set})
#    response = "You're looking at the results of question %s."
#    return HttpResponse(response % question_id)

def vote(request, question_id):
    question = get_object_or_404(Question, pk=question_id)
    try:
        selected_choice = question.choice_set.get(pk=request.POST['choice'])
    except (KeyError, Choice.DoesNotExist):
        # Redisplay the question voting form.
        return render(request, 'polls/detail.html',{
            'question': question,
            'error_message': "You didn't select a choice."
        })
    else:
        selected_choice.votes += 1
        selected_choice.save()
        # Always return an HttpResponseReirect after successfully dealing
        # with POST data. This prevents data from being posted twice if a
        # user hits the Back button.
        return HttpResponseRedirect(reverse('polls:results', args=(question.id,)))

#    return HttpResponse("You're voting on question %s." % question_id)

